<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <script src="../react18/react.development.js"></script>
    <script src="../react18/react-dom.development.js"></script>
    <script src="../react18/babel.min.js"></script>

</head>

<body>
    <div id="app"></div>
    <script type="text/babel">

        class Parent extends React.Component {
            state = {
                car: "八手奥托"
            }
            render(){
                const {car} =this.state
                return (
                    <div>
                    <h1>我是父组件</h1>    
                    <p>我开的车是{car}</p>
                    <button onClick={this.changeCarHandle}>换车</button>
                    <hr/>
                    <Child car={car}/>
                    </div>
                )
            }
            changeCarHandle=()=>{
                this.setState({car:"奥迪RS7"})
            }
        }
function Child(props){
    let{car}=props;
   
  
    return(
        <p>我是子组件，我开父的车{car}</p>
    )
}
const root = ReactDOM.createRoot(document.getElementById("app"))
root.render(<Parent/>)
    </script>
</body>

</html>